I'm just starting out with watercolor, and I'm trying to figure out what technique was used to create the beautiful splash effect shown here: http://www.100layercake.com/blog/wp-content/uploads/2013/07/Runaway-pop-up-San-Diego-wedding-16.jpg

I went to my art store today and they suggested granulation medium..... but no luck. I've tried alcohol and salt too. Might you have any advice?